// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_BASE_MEDIA_URL_DEMUXER_H_
#define MEDIA_BASE_MEDIA_URL_DEMUXER_H_

#include <stddef.h>

#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "media/base/demuxer.h"
#include "url/gurl.h"

namespace base {
class SingleThreadTaskRunner;
}

namespace media {

// Class that saves a URL for later retrieval. To be used in conjunction with
// the MediaPlayerRenderer.
//
// Its primary purpose is to act as a dummy Demuxer, when there is no need
// for DemuxerStreams (e.g. in the MediaPlayerRenderer case). For the most part,
// its implementation of the Demuxer are NOPs that return the default values and
// fire any provided callbacks immediately.
//
// If Pipeline where to be refactored to use a DemuxerStreamProvider instead of
// a Demuxer, MediaUrlDemuxer should be refactored to inherit directly from
// DemuxerStreamProvider.
class MEDIA_EXPORT MediaUrlDemuxer : public Demuxer {
public:
    MediaUrlDemuxer(
        const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
        const GURL& media_url,
        const GURL& first_party_for_cookies);
    ~MediaUrlDemuxer() override;

    // DemuxerStreamProvider interface.
    DemuxerStream* GetStream(DemuxerStream::Type type) override;
    MediaUrlParams GetMediaUrlParams() const override;
    DemuxerStreamProvider::Type GetType() const override;

    // Demuxer interface.
    std::string GetDisplayName() const override;
    void Initialize(DemuxerHost* host,
        const PipelineStatusCB& status_cb,
        bool enable_text_tracks) override;
    void StartWaitingForSeek(base::TimeDelta seek_time) override;
    void CancelPendingSeek(base::TimeDelta seek_time) override;
    void Seek(base::TimeDelta time, const PipelineStatusCB& status_cb) override;
    void Stop() override;
    void AbortPendingReads() override;
    base::TimeDelta GetStartTime() const override;
    base::Time GetTimelineOffset() const override;
    int64_t GetMemoryUsage() const override;
    void OnEnabledAudioTracksChanged(const std::vector<MediaTrack::Id>& track_ids,
        base::TimeDelta currTime) override;
    void OnSelectedVideoTrackChanged(const std::vector<MediaTrack::Id>& track_ids,
        base::TimeDelta currTime) override;

private:
    MediaUrlParams params_;

    scoped_refptr<base::SingleThreadTaskRunner> task_runner_;

    DISALLOW_COPY_AND_ASSIGN(MediaUrlDemuxer);
};

} // namespace media

#endif // MEDIA_BASE_MEDIA_URL_DEMUXER_H_
